package backtype.storm.security.auth;

import java.util.Map;

import javax.security.auth.login.Configuration;

import org.apache.thrift.TProcessor;
import org.apache.thrift.server.TServer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


public class ThriftServer {
    private static final Logger LOG = LoggerFactory.getLogger(ThriftServer.class);
    private Map _storm_conf; // storm configuration
    protected TProcessor _processor = null;
    private int _port = 0;
    private TServer _server = null;
    private Configuration _login_conf;


    public ThriftServer(Map storm_conf, TProcessor processor, int port) {
        try {
            _storm_conf = storm_conf;
            _processor = processor;
            _port = port;

            // retrieve authentication configuration
            _login_conf = AuthUtils.GetConfiguration(_storm_conf);
        }
        catch (Exception x) {
            LOG.error(x.getMessage(), x);
        }
    }


    public void stop() {
        if (_server != null)
            _server.stop();
    }


    /**
     * Is ThriftServer listening to requests?
     * 
     * @return
     */
    public boolean isServing() {
        if (_server == null)
            return false;
        return _server.isServing();
    }


    public void serve() {
        try {
            // locate our thrift transport plugin
            ITransportPlugin transportPlugin = AuthUtils.GetTransportPlugin(_storm_conf, _login_conf);

            // server
            _server = transportPlugin.getServer(_port, _processor);

            // start accepting requests
            _server.serve();
        }
        catch (Exception ex) {
            LOG.error("ThriftServer is being stopped due to: " + ex, ex);
            if (_server != null)
                _server.stop();
            Runtime.getRuntime().halt(1); // shutdown server process since we
                                          // could not handle Thrift requests
                                          // any more
        }
    }
}
